Why aren't parameters binding to WebAPI app?

Question

I'm accessing a WebAPI resource like this:

localhost/myapp/api/values?ParamOne=123&ParamTwo=testing

In ValuesController, I have this:

public class MyParams {
  public int? ParamOne {get;set;}
  public string ParamTwo {get;set;}
}

[HttpGet]
public HttpResponseMessage Get([FromUri]MyParams someparams) {
  ...
}

When I try to access the resource, I get this error:

HTTP Error 403.14 Forbidden The Web server is configured to not list the contents of this directory

Here's the RouteConfig.cs, which is just the default:

routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
  name: "Default",
  url: "{controller}/{action}/{id}",
  defaults: new {controller="Home", action="Index", id=UrlParameter.Optional}

Anyone know what I'm doing wrong?

Is it an api controller or mvc controller? The route config looks like mvc config while the uri looks like api. — Arghya C
– Arghya C, Commented Sep 16, 2016 at 17:43
Look for the web api config inside the WebApiConfig file inside App_Start folder. — Arghya C
– Arghya C, Commented Sep 16, 2016 at 17:45

Oluwafemi · Accepted Answer · 2016-09-16 22:30:20Z

1

Your WebAPI Get endpoint is expecting someparams as parameter not ParamOne and ParamTwo.

Changing your endpoint signature to the below should work with the given URL:

localhost/myapp/api/values?ParamOne=123&ParamTwo=testing

public HttpResponseMessage Get(int? ParamOne, string ParamTwo)

Updates

The route configuration above in your question is for MVC controller not WebAPI Controller. See below for WebAPI route config:

public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API configuration and services

            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                    name: "DefaultApi",
                    routeTemplate: "api/{controller}/{id}",
                    defaults: new { id = RouteParameter.Optional }
            );
        }
    }

In Global.asax.cs Application_Start() method, it is registered like so:

GlobalConfiguration.Configure(WebApiConfig.Register);

NuGet packages required:

Microsoft.AspNet.WebApi.Core
Microsoft.AspNet.WebApi.WebHost

One more thing, your controller must inherit from ApiController not Controller

edited Sep 16, 2016 at 22:30

answered Sep 16, 2016 at 20:32

Oluwafemi

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1 Comment

4thSpace Over a year ago

That doesn't work either. What does the RouteConfig look like for this?

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